[Intel-gfx] [PATCH] drm/i915: Do both mt and gen6 style forcewake reset on ivb probe

[Chris Wilson]

On Fri, Feb 27, 2015 at 06:11:09PM +0200, Mika Kuoppala wrote:
> commit 05a2fb157e44 ("drm/i915: Consolidate forcewake code")
> failed to take into account that we have used to reset both
> the gen6 style and the multithreaded style forcewake registers.
> This is due to fact that ivb can use either, depending on how the
> bios has set up the machine.
> 
> Mimic the old semantics before we have determined the correct variety
> and reset both before the ecobus probe.
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Huang Ying <ying.huang at intel.com>
> Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>

Lgtm, do we have a reference for the testing scenario that blew up?
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre